Disk Inventory X

Disk Inventory X is a disk space analyzer utility for Mac OS X 10.3 and later. Inspired by WinDirStat, it shows the sizes of files and folders in a graphical treemap.

Version 1.3 of Disk Inventory X added support for macOS 10.15 Catalina, while the earlier version 1.2 added support for macOS 10.14 Mojave and its dark mode feature.

Reception

 * Mark Frauenfelder, founder of Boingboing, wrote in his book, Rule the Web: how to do anything and everything on the Internet—better, Disk Inventory X was his favorite way of uncovering disk-hogging files.
 * Download.com gave it 4 out of 5.